1808 in Wales
- 5 January - First issue of The North Wales Gazette is printed at Bangor.
- 19 November - The naval frigate HMS Owen Glendower is launched.
- date unknown
- Construction of the Horseshoe Falls on the River Dee by Thomas Telford.
- The publishing house Gwasg Gee is founded.
- St Katherine's Church, Milford Haven, built by Charles Francis Greville, is consecrated.
- Benjamin Hall is given the Abercarn estate by his father-in-law, Richard Crawshay.
- William Lort Mansel becomes Bishop of Bristol.
- The White Book of Hergest is destroyed in a fire at Covent Garden.
- The Ruabon Brook Tramway is extended from Acrefair to the Plas Madoc Colliery in Plasbennion.
- Twelve-year-old Charles Nice Davies goes to serve in India as an ensign.
Arts and literature
- Robert Davies (Bardd Nantglyn) - Ieithiadur neu Ramadeg Cymraeg
- Thomas Edwards (Twm o'r Nant) - Bannau y Byd
- Felicia Hemans - Juvenile Poems
- Titus Lewis - Llyfr Rhyfeddodau
- Hymnau o Fawl i Dduw a'r Oen (hymns by Ann Griffiths, posthumously published)
- 30 January - Sir John Henry Scourfield, author (died 1876)
- 6 March - William Williams (Carw Coch), man of letters and eisteddfodwr (died 1872)
- 13 May - Thomas Aubrey, Wesleyan leader (died 1867)
- date unknown
- 21 January - Richard Pennant, 1st Baron Penrhyn, 70?
- 30 November - Watkin Williams, politician, 66?
- 28 December - Griffith Roberts, physician and collector of manuscripts, 73
- Jowett, Alan (1989). Jowett's Railway Atlas. Patrick Stephens Limited. pp. 57, 59. ISBN 1-85260-086-1.
- "Dic Penderyn (Richard Lewis)". 100 Welsh Heroes. Retrieved 21 August 2006.
- Lloyd, John Edward; Jenkins, R.T. (1958). The Dictionary of Welsh Biography, Down to 1940. Cardiff: William Lewis. p. 890.